Problem: The patient returns to clinic two weeks later and states medication is not helping even after she doubled the dosage per the ER doctor. She went to eat with her friends at a Mexican restaurant two days ago and stomach pain worsened and her friends took her to the ER. The ER discharge paperwork shows a normal CT scan of the abdomen with normal CBC and CMP reports. She stopped NSAID use and has been treating knee pain with Tylenol once daily and this is helping somewhat. Her friend who is a nurse said she could not trust those ER doctor and that she may have an infection causing her symptoms. She asks to be tested for this. What test would you order and what is the possible cause of her symptoms? Need Assignment Help?